Consider the Following Gas Phase Reaction at 25 °C

question 104

Multiple Choice

Consider the following gas phase reaction at 25 °C.
N₂(g) + C₂H₂(g) ⇌ 2 HCN(g)
1.600 mol N₂(g) and 1.750 mol C₂H₂(g) are placed in a 1.000 L vessel and the mixture is allowed to react.At equilibrium,there are 1.587 mol N₂(g) in the mixture.What is K_c for this reaction at 25 °C?

• A)9.8 × 10^-4
• B)9.4 × 10^-3
• C)2.5 × 10^-4
• D)4.7 × 10^-3
• E)6.7 × 10^-5

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